Abstract
In this paper, a combination of mineral oil and synthetic ester oil in a standard mass ratio is used as an alternative liquid dielectric for power transformers instead of traditional mineral oil. In these mixed oils, the two alternative solid dielectrics of transformers, namely thermally upgraded Kraft and Nomex-910, are impregnated. An accelerated aging test is performed on these samples at different temperatures ranging from 100 to 180 °C. Further, ultraviolet spectroscopy test is performed in order to determine the thermal degradation as well as oxidation rate of these samples. It has been observed from the test results that Nomex impregnated mixed oil samples have lower oxidation rate as compared to that of thermally upgraded mixed oil samples. Therefore, Nomex impregnated transformers have lower oxidation rate and longer service life as compared to TUK impregnated transformers. The present experimental study is very beneficial to the transformer manufacturing companies as well as utilities.
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Fofana, I., Wasserberg, V., Borsi, H., Gockenbach, E.: Challenge of mixed insulating liquids for use in high-voltage transformers, part 1: investigation of mixed liquids. IEEE Electr. Insul. Mag. 18(3), 18–31 (2005)
Fofana, I., Wasserberg, V., Borsi, H., Gockenbach, E.: Challenge of mixed insulating liquids for use in high-voltage transformers, Part 2: investigation of mixed liquids Impregnated paper Insulation. IEEE Electr. Insul. Mag. 18(4), 5–16 (2002)
Rao, U.M., Sood, Y.R., Jarial, R.K.: Oxidation stability enhancement of a blend of mineral and synthetic ester oils. IEEE Electr. Insul. Mag. 32(2), 43–47 (2016)
Rao, U.M., Sood, Y.R., Jarial, R.K.: Performance analysis of liquid dielectric for power transformer. IEEE Trans. Dielectr. Electr. Insul. 23, 2475–2484 (2016)
Perrier, C., Beroual, A., Bessede, J.L.: Improvement of power transformers by using mixtures of mineral oil with synthetic esters. IEEE Trans. Dielectr. Electr. Insul. 13(3), 556–564 (2006)
Ranga, C., Chandel, A.K.: Oxidation stability of TUK and Nomex insulated power transformers. In IEEE Annual India Conference (INDICON) (2016)
ASTM E275-01 Standard.: Standard Practice for Describing and Measuring Performance of Ultraviolet, Visible, and Near-Infrared Spectrophotometers, vol. 03.06, pp. 72–81 (2001)
ASTM D923-07 Standard.: Standard Practices for Sampling Electrical Insulating Liquids (2007)
Zhang, X., Shen, S., Xu, Y., Lei, Q., Liu, G., Chen, R., Li, X.: Thermal evaluation of high-temperature insulation system for liquid-immersed transformer. In Electrical Insulation Conference (EIC) (2016)
Martin, D., Wijaya, J., Lelekakis, N., Sisa, D., Heyward, N.: Thermal analysis of two transformers filled with different oils. IEEE Electr. Insul. Mag. 30(1), 39–45 (2014)
Acknowledgements
Authors are thankful to the authorities of TEQIP–II of NIT Hamirpur India for providing financial support with grant number NIT/HMR/TEQIP–II/Research and Development–9/2015/2157–63. Authors are also grateful to the authorities of TIFAC CORE Center of NIT Hamirpur India, and DuPont India for providing the necessary materials and facilities to perform the experiments of the present research.
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Kumar, M., Ranga, C., Chandel, A.K., Mishra, A.K. (2018). Thermal Evaluation and Oxidation Stability of High Temperature Alternative Solid Dielectrics of Power Transformers in Mixed Oil. In: Singh, S., Wen, F., Jain, M. (eds) Advances in Energy and Power Systems. Lecture Notes in Electrical Engineering, vol 508. Springer, Singapore. https://doi.org/10.1007/978-981-13-0662-4_13
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DOI: https://doi.org/10.1007/978-981-13-0662-4_13
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